The Biohazard Symbol

Summary

The biohazard symbol is circular in design. The basic outline is a plain trefoil comprised of 3 circles that overlap each other equally like a triple Venn diagram. However, the overlapping parts are erased.

Details

The diameter of the overlapping part is equal to half the radius of the three circles.

Then three inner circles are drawn in with 2 thirds radius of the original circles so that it is tangent to the outside three overlapping circles. A tiny circle in center has a diameter ½ of the radius of the three inner circles, and arcs are erased at 90°, 210°, and 330°.

The arcs of the inner circles and the tiny circle are connected by a line.

Finally, the ring under is drawn from the distance to the perimeter of the equilateral triangle that forms between the centers of the three intersecting circles. An outer circle of the ring under is drawn and finally enclosed with the arcs from the center of the inner circles with a shorter radius from the inner circles.

The symbol is black on a white background.

Long description ends.